JP2000079099A - Fundus camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable confirmation of data by looking through a finder, and prevent the data from being photographed on a film. SOLUTION: This fundus camera is provided with a photographic optical system capable of fluorescence photography of the fundus of the eye, and a display 61 provided in the photographic optical system to display data. By interlocking with selection of a fluorescence photography mode, the inner display 61 is actuated, and every time a photographing switch 72 is pushed, action of the inner display 61 is temporarily stopped to execute photographing by a control circuit 80.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fundus camera having a photographing optical system and an internal display provided in the photographing optical system.

[0002]

2. Description of the Related Art In fluorescence imaging of a fundus, a fluorescent agent is first intravenously injected into a subject, and then imaging is performed after the fluorescent agent starts appearing in blood vessels of the fundus.

[0003] In this technique, the flow of a fluorescent agent entering a blood vessel of the fundus, which changes with the passage of time, is imaged. The timer is running. The time measured by the timer and the number of shots are displayed on an internal display provided in the shooting optical system, and the time count and the number of shots are printed along with the fundus image.

[0004]

However, since the examiner observes the photographed fundus image after one photographing operation is completed, the number of photographed images can be determined by a negative.

[0005] For this reason, it is sufficient to be able to check the number of shots by looking through the finder during shooting, and there is a case where the user does not want to print the number of shots on the film.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a fundus camera capable of confirming data by looking through a finder and in which the data is not printed on film. To provide.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, there is provided an imaging optical system capable of performing fluorescence imaging of a fundus, and an internal display means provided in the imaging optical system for displaying data. A fundus camera for photographing the fundus together with the data displayed on the internal display means,
The internal display means is operated in conjunction with the selection of the fluorescence imaging mode, and the operation of the internal display means is temporarily stopped every time a photographing switch is pressed to execute photographing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fundus camera according to the present invention will be described below with reference to the drawings.

The fundus camera 1 shown in FIG. 1 includes an illumination optical system 20 for illuminating the fundus Er of the eye E to be examined, and a photographing optical system 30 for photographing the fundus Er.

The illumination optical system 20 includes a halogen lamp 24 as a light source for observation, a condenser lens 25, a xenon lamp 26 as a light source for photographing, and a condenser lens 2
7 and a ring-shaped diaphragm 28 conjugate with the pupil of the eye to be examined
, An exciter filter F, a reflection mirror 29, a relay lens 23, a perforated mirror 31, and an objective lens 32.
And The exciter filter F is disposed so as to be detachable from the optical path. The exciter filter F is inserted into the optical path at the time of fluorescence imaging, and the exciter filter F is detached from the optical path at the time of a normal imaging mode.

The photographing optical system 30 has an objective lens 32, a barrier filter B, a focusing lens 33, and an imaging lens 34 for forming a fundus image on a film 35.

The photographing optical system 30 includes an internal display optical system 60, a TV camera photographing system 40, and a finder optical system 50.

The TV camera photographing system 40 includes a half mirror 4
1, a reflection mirror 42, and an imaging element 43 arranged at a position conjugate with the fundus. Viewfinder optical system 50
Has a quick return mirror 51, a field lens 52, a reflection mirror 53, and an eyepiece 54.

The internal display optical system 60 has a display (internal display means) 61 composed of a light emitting diode or the like, an imaging lens 62, and a mirror 63.

The display 61 is provided at a position conjugate with the film 35, and as shown in FIG.
And a lower display section 61B. In the normal shooting mode, the upper display section 61A displays a counter indicating the number of shots as shown in FIG. 2A, and the lower display section 61B displays “L” or “R” indicating left and right eyes. Characters and
The angle of view is displayed. In the fluorescence imaging mode, the upper display 61A displays the time measured by an internal timer (not shown) as shown in FIG. 2B, and the lower display 61B displays a counter indicating the number of shots, "L" indicating left and right eyes
And the character "R" and the angle of view are displayed.

As shown in FIG. 3, the display 63 has a mirror 63 so that it can be seen above the fundus Er when viewed through the eyepiece 54 so as not to obstruct the observation of the fundus Er.

FIG. 4 is a block diagram showing a configuration of a control system of the ophthalmologic apparatus. In FIG. 4, reference numeral 71 denotes a shooting mode setting switch for setting a fluorescence shooting mode or a normal shooting mode;
72 is a shooting switch, 73 is a quick return mirror 5
1, a solenoid for inserting the exciter filter F into or out of the optical path, a solenoid 75 for inserting the barrier filter B in or out of the optical path, and a photographing mode setting switch 80 It is a control circuit that controls the lighting of the display 61, the operation of the solenoids 73 to 75, the lighting of the lamps 24 and 26, and the like based on the operation of the shooting switch 71 and the shooting switch 72.
The control circuit 80 includes a CPU and the like.

Next, the operation of the retinal camera of the above embodiment will be described with reference to the flowchart shown in FIG. In addition,
In the drawings, steps are denoted as “S”.

When a main switch (not shown) is turned on,
The control circuit 80 turns on the halogen lamp 24. The illumination of the halogen lamp 24 illuminates the fundus Er,
The fundus Er can be observed through the finder optical system 50. Then, in step 1, it is determined whether the mode is the fluorescence imaging mode or the normal imaging mode.
If yes, go to step 2.

Now, for example, a photographing mode setting switch 71
When the fluorescence imaging mode is set in step 1, it is determined to be yes in step 1 and the process proceeds to step 2. In step 2, as shown in FIG. 2B, the time measured by an internal timer (not shown), the counter indicating the number of shots, the characters “L” and “R”, and the angle of view are displayed on the display 61. Is displayed. At this stage, since the internal timer has not been started, the counted time is displayed as zero.

When the internal timer is started by a start switch (not shown), timing of the internal timer is started, and the measured time is displayed on the upper display 61A of the display 61. On the other hand, by setting the fluorescence mode,
When the solenoids 74 and 75 are excited, the exciter filter F and the barrier filter B are inserted into the optical path.

In step 3, it is determined whether or not the photographing switch 72 has been turned on. If no, the process returns to step 3. That is, the process waits in step 3 until the photographing switch 72 is turned on. When the photographing switch 72 is turned on, it is determined “yes” in Step 3 and Step 4
Proceed to.

In step 4, only the counter display indicating the number of shots on the display 61 is turned off. And step 5
Then, the quick return mirror 51 jumps up by the excitation of the solenoid 73, and the photographing is performed. By executing this photographing, the time measured by the internal timer and the characters “R” or “L” indicating the left and right eyes and the angle of view, which are displayed on the display 61 together with the fundus image, are imprinted. Will not be imprinted.

Then, in step 6, it is determined whether or not one second has elapsed. If no, the process returns to step 6 and waits in step 6 until one second has elapsed. If the answer is affirmative in step 6, the process proceeds to step 7. In step 7, it is determined whether or not all shootings have been completed. "1" is added and the process returns to step 2, and the operations of steps 2 to 7 are repeated until all shooting is completed.

When the normal shooting mode is set by the shooting mode setting switch 71, the process proceeds from step 1 to step 8. In step 8, the display 61 shows FIG.
As shown in (A), a counter indicating the number of shots, characters “L” and “R”, and an angle of view are displayed. And
In the same manner as above, it is determined in step 3 whether or not the photographing switch 72 has been turned on. In step 4, only the counter display, which is the number of photographed images, on the display 61 is turned off. Then, photographing is performed in step S5. By executing this photographing, the characters “R” or “L” indicating the left and right eyes displayed on the display 61 together with the fundus image and the angle of view are projected, and the counter of the number of photographed images is not projected. become.

In the same manner as described above, if it is determined NO in step 7, "1" is added to the display of the counter indicating the number of shots, and the process returns to step 8, until steps 2 to 2 are completed. The operation of Step 7 is repeated.

As described above, the display 61 has the structure shown in FIG.
As shown in FIG. 2A and FIG. 2B, various data are displayed, so that each data can be confirmed by looking through the finder. In addition, at the time of photographing execution, only the counter display is turned off, so that the number of photographed images is not printed.

In this embodiment, only the number of shots is prevented from being imprinted, but it is a matter of course that the time measured by the internal timer, the angle of view, and the like may not be imprinted.

In the above embodiment, the display on the display 61 is switched by the photographing mode setting switch 71. However, the display may be switched by a timer selection switch (not shown).

[0030]

According to the first aspect of the present invention, there is provided a fundus camera including a photographing optical system capable of photographing a fundus with fluorescence and internal display means provided in the photographing optical system for displaying data. Since the internal display means is operated in conjunction with the selection of the photographing mode, and the operation of the internal display means is temporarily stopped every time the photographing switch is pressed, and the photographing is performed. You can check the data by peeping, but the data is not printed on the film.

[Brief description of the drawings]

FIG. 1 is an optical arrangement diagram showing an arrangement of an optical system of a fundus camera according to the present invention.

FIG. 2A is an explanatory diagram showing a display mode of a display unit in a normal shooting mode. (B) It is explanatory drawing which showed the display form of the display in the fluorescence imaging mode.

FIG. 3 is an explanatory diagram showing a fundus and a display as viewed through an eyepiece.

FIG. 4 is a block diagram showing a configuration of a control system of the fundus camera.

FIG. 5 is a flowchart showing the operation of the fundus camera.

[Explanation of symbols]

 61 display 72 shooting switch 80 control circuit

Claims (1)

[Claims] 1. A fundus camera comprising: a photographing optical system capable of photographing a fluorescence of a fundus; and an internal display means provided in the photographing optical system for displaying data. A fundus camera characterized by activating an internal display means and temporarily stopping the operation of the internal display means each time a photographing switch is depressed to execute photographing.